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3. Liver tumors in rats fed thiourea or thioacetamide;Fitzhugh;Science,1948
4. A comparison of the chronic toxicities of synthetic sweetening agents;Fitzhugh;J. Am. Pharm. Assoc. Sci. Ed.,1951
5. Chronic toxicities of two food colors, FD&C Red No. 32 and FD&C Orange No. 2;Fitzhugh,1956